Clamp assembly with locking feature

A muffler saddle clamp assembly comprising:

• a saddle clamp U-shaped in cross-section having a pair of laterally spaced arms with arcuate aligned notches, said arms being connected together by a base;
• said base having deformed end portions having bolt holes therein;
• transverse shoulders at the inner ends of said deformed portions;
• and wherein there is included a U-bolt having threaded free ends, and nuts having a plurality of exterior sides and points therebetween, said nuts being for threadable reception on said threaded ends, the points of said nuts being adapted to initially engage the shoulders as said nuts are tightened and when fully tightened, a flat side of the nuts engage respective shoulders.